The new episodes of Arrested Development won't be on Fox, or any other network, just Netflix. So it is an example of what you're talking about.
That might appear to mean that what we said in this Intermission episode - that there's not enough money in internet distibution to pay for network-level product - is already wrong. But in our defense, we did point out that this is an ongoing thing, and budgets for internet projects are getting bigger all the time.
And I suspect that the budgets for these new episodes won't be nearly as high as they were for the original run. The show's producers are using the new mini-season as a run-up to a feature version, so I betcha they're taking a bit of a pay cut in hopes of getting their real payback with a hit movie later. They're already hinting that each episode will focus on one cast member - which is a good way to keep costs down.
And it makes sense for Netflix to use that show as an experiment, because AD already has an existing fanbase. Not big enough to interest a network... but if Netflix can get new episodes for a reasonable price, it might be quite successful for them. Obviously Netflix already has plenty of data on how well AD episodes do on DVD and streaming, since they're one of the companies that's been doing the renting and streaming.
So, although it'll be a while before an online venue greenlights something on the scale of a Terra Nova, or even a Firefly, we might start seeing them pick up other established lower-budget shows like... well, Community, if NBC does decide to drop that one.
It's actually a very interesting time - even though right now you still need the brand name of a show like AD, or a big star name, like Netflix's other experiment, with an original Kevin Spacey series - to get a web outlet to risk spending real money... it IS starting to happen.